PSP's 11th encounter was on February 25th, 2022. This perihelion was Earth-facing and was well-observed from Earth, and also Solar Orbiter was close by. We expected one low-latitude coronal hole on the Sun from which high-speed streams should be seen by PSP, as well as several active regions on the solar disk. During this encounter, we focussed the observations on the coronal hole and the associated high-speed stream, on switchbacks and their solar counterparts in the lower atmosphere, and on flares and the associated energetic particles in the inner heliosphere. Remote observations of PSP's crossing of the solar disk focussed on February 24th to 26th, and off-limb observations at larger distances of PSP to the Sun at the period before and after.
If you have observational results to share, please contact us at whpi_help@hao.ucar.edu.
Halpha images taken at the Dunn Solar Telescope with the new Andor Zyla sCMOS camera. On Feb 22, the DST observed the Eastern limb near the equator. The Feb 24 image was taken of AR 12955. Seeing was moderate on both days and images were speckle reconstructed using 30 frames for a final cadence of 1 second. The field of view is 150"x150" and the spatial resolution is 0.09"/pixel.
